勤益科大機構典藏:Item 987654321/4820
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    Please use this identifier to cite or link to this item: http://ir.lib.ncut.edu.tw/handle/987654321/4820


    Title: G.729之LSP向量量化計算複雜度化簡
    Authors: 卓長志
    葉政育
    Contributors: 電機工程系
    Keywords: 編碼簿
    向量量化
    線頻譜對
    語音編碼
    Date: 2010
    Issue Date: 2013-07-31 13:49:43 (UTC+8)
    Publisher: 台中;國立勤益科技大學
    Abstract: 本論文之研究目的為降低G.729語音編碼演算法中LSP向量量化方法之計算複雜度。為達到此目的,本論文提出了Hybrid two-stage VQ來取代G.729所使用的two-stage VQ,此Hybrid two-stage VQ主要是將原本G.729所使用的碼本(codebook)經過再次的訓練,修改成為以二元樹狀結構之搜尋方法,如此可大大地減少搜尋次數及降低計算量。最後,經由實驗數據證明,本論文提出之方法在計算量上較原始方法節省了約80%。但在語音品質上,以PESQ-MOS分數來做觀察,本文方法可保持在原始G.729標準的97.5%。由此可以證明我們所提出的方法可成功達到本論文的目標。
    Appears in Collections:[Department of Electrical Engineering] 【電機工程系所】博碩士論文

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